/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/*!
 * \file src/relay/transforms/fake_quantization_to_integer.h
 * \brief Extract subgraph of a fake quantized region.
 */
#ifndef TVM_RELAY_TRANSFORMS_FAKE_QUANTIZATION_TO_INTEGER_H_
#define TVM_RELAY_TRANSFORMS_FAKE_QUANTIZATION_TO_INTEGER_H_

#include <tvm/ir/affine_type.h>
#include <tvm/relay/expr_functor.h>

#include <unordered_set>

namespace tvm {
namespace relay {

class SubgraphExtractor : public ExprVisitor {
 public:
  const std::unordered_set<Expr, ObjectPtrHash, ObjectPtrEqual> GetSubgraph(const Expr& expr);
  const Map<Expr, AffineType> GetAffineTypes();
  void VisitExpr(const Expr& expr) override;

 protected:
  void VisitExpr_(const CallNode* call_node) override;

 private:
  const Op quantize_op_ = Op::Get("qnn.quantize");
  const Op dequantize_op_ = Op::Get("qnn.dequantize");
  bool is_fake_quantized_ = true;
  Map<Expr, AffineType> affine_types_;
};

}  // namespace relay
}  // namespace tvm

#endif  // TVM_RELAY_TRANSFORMS_FAKE_QUANTIZATION_TO_INTEGER_H_
